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SubjectRe: read() syscall slowing down due to other threads?
On Mon, Apr 30, 2012 at 11:40 PM, Nick Piggin <> wrote:
> It could be memory or coherency traffic that's causing a slowdown across
> the system?
> Could a dynamic core frequency / thermal throttling explain any of the
> slowdown?

Thanks for these suggestions. I checked the BIOS, and indeed it was
set to "Hybrid power/performance." I just reset the server to "Static
high performance" which I believe turns off processor frequency power
optimizations. I'll re-run our workload and see if that has an

Thanks, George

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